The gasworks in New Tredegar started gas production at the end of October 1874. The new Tredegar Gas Company offered to light, extinguish, and supply the lamps at Tir-phil with gas for £ 3 10s per lamp per annum (South Wales Daily News 8th October 1877). The New Tredegar Gas and Water Company Limited, was registered under the Companies' Acts of 1862 and 1867. This Company, formed for the purpose of supplying the important and thriving colliery districts of New Tredegar, Tir-Phil, and the adjacent villages with gas and water, has for the past two years supplied gas to the district, and although a large portion of the profits had to be spent on the Works. Yet the last year's working realised a fair dividend to the Shareholders. The works being completed, no further expenditure on them' is needed (South Wales Daily News 14th December 1876). In 1883 the New Tredegar Gas and Water Company authorised share capital of £3,800 and had in 1881 produced 2.1m cu.ft. of 14 cp gas from 2880 tons of coal. In 1898 New Tredegar gasworks were producing 2m cu.ft. of gas from 480 tons of coal and Mr J.H. Philips was the manager. The Bedwellty District Council Gas Act of 1912 was to enable transfer the New Tredegar Gas & Water Co. to the Council. and the Blackwood Gas Co. will be purchased, part of the Blackwood district being purchased by the Mynyddislwyn Council. Mynyddislwyn would pay Bedwellty £2,705 for the portion within their area. There was provision for the supply in bulk of gas from Bedwellty UDC Gas Dept. to Mynyddislwyn until they can provide a gas works of their own. In 1915 the Annual gas production 11m cu.ft., sales 7,5 m cu.ft. of 14cp gas, from 1,183 tons of coal. Total customers 589 of whom 370 slots and 70 stoves. 7 miles of mains. William Turk was the Manager. The UDC also took over the Blackwood Gas Company and probably supplied the holder there from New Tredegar. The 1920 BoT return says the area of supply was "District of Council except parts in limits of Rhymney Gas & Water Co. Beyond: - Part of the Rhymney Valley in the Urban District of Gelligaer and part of the Urban District of Mynyddislwyn". 24,330,000 cu.ft. of 14cp gas made from 2,734 tons of coal. 22m cu.ft. bought in bulk from R&AV Gas Co. 13.2m cu.ft. sold to 400 ordinary consumers. 9.6m cu.ft. sold to 800 slot consumers. 4.2m cu.ft. 310 public lamps. 10.3m cu.ft. sold in bulk to Mynyddislwyn. 37.5m cu.ft. Total Sales. In 1930 a bulk supply from Rhymney & Aber Valley Gas Co. of 58 m cu.ft.., with no production at New Tredegar. Mynyddislwyn UDC bought 21m cu.ft. of gas from Bedwellty UDC in 1930. In 1945 52m cu.ft. was gas purchased, 39m cu.ft. was sold. Price 5/2d and 5/11d. Horizontal plant held in case of reserve. B. Jones, Manager. (Gas World Yearbook). Ministry of Fuel and Power figures say 90m cu.ft. sold by Rhymney & Aber, 90 purchased by Bedwellty UDC and 29m cu.ft. sold by Bedwellty UDC to Mynyddislwyn UDC. In 1947 141 m cu.ft. sold by Rhymney & Aber, 114 m cu.ft. purchased by Bedwellty UDC and 48 m cu.ft. passed to Mynyddislwyn UDC. Vested in the Wales Gas Board from the Bedwellty UDC. The gasworks were visible on the 1900 to 1995 OS maps but labelled on the 1916 OS map as disused.